/** @module Interface wasi:io/poll@0.2.3 **/
/**
 * Poll for completion on a set of pollables.
 * 
 * This function takes a list of pollables, which identify I/O sources of
 * interest, and waits until one or more of the events is ready for I/O.
 * 
 * The result `list<u32>` contains one or more indices of handles in the
 * argument list that is ready for I/O.
 * 
 * This function traps if either:
 * - the list is empty, or:
 * - the list contains more elements than can be indexed with a `u32` value.
 * 
 * A timeout can be implemented by adding a pollable from the
 * wasi-clocks API to the list.
 * 
 * This function does not return a `result`; polling in itself does not
 * do any I/O so it doesn't fail. If any of the I/O sources identified by
 * the pollables has an error, it is indicated by marking the source as
 * being ready for I/O.
 */
export function poll(in_: Array<Pollable>): Uint32Array;

export class Pollable {
  /**
   * This type does not have a public constructor.
   */
  private constructor();
  /**
  * Return the readiness of a pollable. This function never blocks.
  * 
  * Returns `true` when the pollable is ready, and `false` otherwise.
  */
  ready(): boolean;
  /**
  * `block` returns immediately if the pollable is ready, and otherwise
  * blocks until ready.
  * 
  * This function is equivalent to calling `poll.poll` on a list
  * containing only this pollable.
  */
  block(): void;
}